CN1111728A

CN1111728A - Device for operating hydraulically operated fittings

Info

Publication number: CN1111728A
Application number: CN95101462A
Authority: CN
Inventors: 阿尔弗雷德·D·玛丽安; 海茵茨·斯特拉特斯马
Original assignee: Paul Pleiger Maschinenfabrik GmbH and Co KG
Current assignee: Paul Pleiger Maschinenfabrik GmbH and Co KG
Priority date: 1994-01-28
Filing date: 1995-01-28
Publication date: 1995-11-15
Anticipated expiration: 2015-01-28
Also published as: NO308145B1; NO950311D0; EP0665381B1; KR100376988B1; EP0665381A1; ES2122350T3; DK0665381T3; NO950311L; KR950033124A; DE59503395D1; JPH07224805A; CN1090297C

Abstract

A system usually used on the ship engineering to intensively provide pressure medium for a plurality of accessories (such as a rotating actuator, a servomotor, etc.) has various disadvantages, for example, the entire system is possibly invalid if one actuator is damaged; the costs for high pressure constant maintenance and complex central control are high; the environment can be polluted because of the long pipe leakage. The invention can effectively overcome the disadvantages, and can drive all the accessories based on a hydraulic/electrical tight structure unit, the components of all the accessories are combined into a unit, each unit or working stations (A, B, C) is/are respectively configured with a miniature hydraulic source to omit a connecting pipe in a liquid supply dispersing way, and each unit is still controlled through a central control board in a concentrated driving way.

Description

Device for operating hydraulically operated fittings

The invention relates to and be used for the device of operating hydraulically operated fittings, on Marine engineering.

On boats and ships, amount to the servomotor and the similar hydraulic work annex (claim usually hydraulic services-down with) of rotary actuator (or actuator), the valve of cover plate, concentrate hydraulic power supply pressure medium by central authorities, from Direct box pressure medium is pumped to each annex, these annexes may have distance quite far away apart from Direct box.

There is multiple unfavorable factor in the pressure medium pipeline, has compressibility such as the pressure medium in long pipe runs; Bearing the annex of high hydraulic pressure may open owing to the load effect; May leak above deck or below the deck; There is environmental pollution problems; Be full of oil to whole pipe-line system before running in and after repairing and need spended time and because the restriction loss that control unit produced etc.The safety problem that particularly is related to whole system is to close critical factor most.

On Marine engineering, need in some cases to be provided with hydraulic medium to about 80 to 140 annexes by central supply station, if central principal pressure conduit failure so just can't be set up high pressure, whole system just can not be worked.

Yet, consider the reason of the reliability of the impact force that taken place and rotary motor under the moment loading and servomotor, concentrate hydraulic power still using by central authorities to the method for each annex supply pressure medium, this is because attempt to have exposed problem by mechanical reducer as drive unit with the motor of decentralized configuration, these drive units are difficult to bear high load, particularly hold and can't stand the impact force that is produced when this annex workpiece.Thereby, for this drive system, extensively adopt hydraulic system.

The present invention is both based on making these systems realize simplifying, simultaneously can keep proving in decades advantage this purpose of effective hydraulic system again, and, especially, increase these systems and security-related performance in the reduction expense with when improving environmental suitability.

Basically can reach this purpose by the present invention is to be to drive these annexes with hydraulic pressure/electric compact unit.The element of handling annex that is useful on all is assembled into an element of construction, each work station or element of construction all have a small-sized hydraulic source and do not need the pump oil pipe line fully, in such a way, each single annex is provided with pressure medium in the mode of disperseing feed flow but still implements centralized driving control by a control panel, but this control is to replace the hydraulic line of in the past being accustomed to adopting by electric lead to realize.

These annexes adopt after the compact unit that this class disperses, and obtain following various advantages with the systematic comparison meeting of routine.

A. rely on and disperse the feed flow measure, during an actuator fault, all the other annex endures did not lose efficacy thereby all system can not take place, and had just kept very high Security yet.

B. need not to connect the feed flow pipeline owing to compact unit, so do not have a large amount of oil to exist in the hydraulic system, reduce the environmental suitability that oil mass has promptly improved system.

C. comprise to whole pipe-line system oil transportation being full of pipeline, and a central feeding assembly and the complicated such structure of Direct box are arranged, cost is quite high.

D. by means of the tight structure of driver, just might realize accurately limiting the moment and the lifting power of rotary actuator and servomotor.

E., the hydraulic unit assembly of oil feed pump is housed by means of collection, can cushions by the impulsive load that causes such as bilge collision, ballast, goods and fuel oil equipment etc.

F. by means of tight structure, such as hydraulic system in the past the control unit that must have just no longer needed, thereby the problem of throttling loss no longer takes place, the annex of rotary actuator class, its opening and closing are to rely on the counterrotating of driver element to realize.

G. see on the whole, with in the past system mutually the saving of specific energy be very significant, because by need keeping working pressure (24 hours constantly) under the central oil pump station centralized oil supply situation continuously, and after the compact unit with dispersion, have only and when work, just connect driver.

H. hydraulic pressure/more further advantage in electric tight structure unit is and can implements step-less adjustment to driver element, corresponding coupling with different size of the rotation of driver element and lifting time.

To do detailed explanation below in conjunction with consulting accompanying drawing by embodiments of the invention, in these accompanying drawings:

Fig. 1 shows the principle of compositionality figure that includes an annex and disperse the element of construction of drive unit;

Fig. 2 expresses the descriptive schematic diagram of the electric actuator of annex among Fig. 1;

Fig. 3 expresses another embodiment's of monitoring of an annex descriptive schematic diagram;

Fig. 4 expresses the additional embodiments of the actuator of one group of annex;

Fig. 5 represents to adopt a kind of remodeling of the actuator of EBI;

Fig. 6 expresses the details that collection is loaded on the EBI in the element of construction;

Fig. 7 shows a side view that is contained in the driver element on the annex;

Fig. 8 is the partial sectional view of driver element shown in Figure 7;

Fig. 9 is the side view that the embodiment of Fig. 7 partly cuts open.

Fig. 1 has illustrated two by a schematic representation and has acted on a side opposite with spring 3 force directions by the reverse annex that the revolving actuator 2 of function forms, the piston of revolving actuator 2 of a valve 1 and tool spring by pressure medium, and the piston of valve 1 is directly driven by the pressure medium in the

pipeline

4,5 that is positioned at element of construction shell both sides.Collection is contained in that to be positioned in this element of construction between two

pipelines

4,5 be two safety overflow valves 6, and this valve 6 raises in temperature, pressure medium expand or analogue under play safety valve, and form an element of construction with annex 1.Pipeline 42 between two safety valves stretches into fuel tank 11.9 represent and do not stop up the one-way valve Pilot operated check valve on the

pipeline

4,5, and one-way valve remains in a previously selected position with annex, and have only shown in the cross one another dotted line of Fig. 1 when just starting annex in the

pipeline

5 or 4 of opposition during existing pressure.Direction control to the On/Off of valve 1 realizes by a motor 7 counterrotatings, motor 7 drives a pump 8, and pump 8 is placed between the

pipeline

4,5 in the tight structure unit,

pipeline

4,5 utilizes pump 8 and depends on that its different sense of rotation is infeeded pressure medium.Two

pipelines

4,5 stretch in the less fuel tank of structure 11, at two pipelines, 4, the 5 terminal relief valves 10 that all are connected to before.40 indications be to open two one-way valves (another valve cuts out during an opening of valves) that switch mutually, pump 8 when right rotation by pipeline 45 by suction pressure medium in the fuel tank 11, for example, right one-way valve 40 cuts out MEDIA FLOW and crosses left side one-way valve 40, vice versa.41 expressions, one adjustable restrictive valve, this throttle valve is associated on the oil supply loop of pump 8 and is positioned between two pipelines 4,5.Make the step-less adjustment of driver element become possibility by means of adjustable restrictive valve 41, the rotation of driver element or lifting time pass through to regulate this throttle valve with the corresponding coupling in different normal pore sizes like this, the part that the oil that pumps out can be flowed is sent the suction side back to by this adjustable restrictive valve, for example can use said method for regulating the annex travelling speed.43 expressions are positioned at the switch on the connecting pipeline (stop valve) between the

pipeline

4,5, and this switch links to each other with the pipeline 42 that stretches to fuel tank 11, and are to need hand control setting for contingency.

Protective system when the relief valve 10 between pump 8 and the fuel tank 11 can be in overvoltage in addition, can work to limit the driver lifting force because they can be adjusted to a suitable pressure.Owing to can carry out different adjustings to the relief valve 10 that is disposed at pump 8 both sides, the pressure that the pressure ratio that pump is produced along certain direction rotation produces when other direction rotates wants high.By the adjusting to relief valve 10, making the moment of torsion of revolving actuator and servomotor and lifting power accurately limited becomes possibility, and wherein relief valve 10 is adjustable to a desirable pressure.

46,46 ' respectively represent a joint of annex, and joint has an one-way valve and continuous with the

pipeline

4,5 of appointment respectively.For example, if because power failure pump 8 when not working, for regulating and a hand pump can be connected on this class joint to valve 1.Fig. 1

show annex

1 or 2 and by shown in the division surface 47 of 48 of the driver elements formed of oil hydraulic circuit.49 and 49 ' respectively represent a pressure switch, and this type of pressure switch links to each other with

pipeline

4,5 respectively.

For the counterrotating that replaces with motor 7 makes the effect of working medium on annex or valve 1 be converted to opposite side from a side, the motor of one folk prescription to rotation also can be provided, and connect an electronic changeable control valve in the downstream side of pump 8, by this control valve, one that the pressure that is provided by pump 8 can be from

pressure medium pipeline

4 or 5 switches to another.

For replacing the throttle valve 41 that can on both direction, all work among the element of construction A ' at two

pressure medium pipelines

4,5 can be provided with paralleling switch, utilize a switch that pressure medium pipeline 5 is communicated with fuel tank 11, and pressure medium pipeline 4 is communicated with fuel tank 11 with another switch.By this kind mode, can carry out differentiated adjusting to rotation or lifting time on rotation or lifting time and the other direction on a certain direction, the degree difference of two switch opens is just variant by the flow of

pressure medium pipeline

4 or 5 shunting oil sump tanks 11 so respectively at this moment.This type of switch of unshowned parallel connection also can be used to alternative switch 43 in Fig. 1, can open for annex 1 is carried out mechanical adjustment two switches, and such two

pressure medium pipelines

4,5 are communicated with fuel tank 11 so that can carry out mechanical adjustment to annex or valve 1.

In annex 2, be provided with same oil hydraulic circuit structure, for substituting second safety valve 6, one magnetically operated valve 12 is provided in Safeguard, valve 12 links to each other with the pipeline 42 that stretches to fuel tank, for example, when voltage failure takes place, the release of a side of annex 2 effect of being stressed, spring 3 can make the annex recovery close like this.Do the time spent when annex 2 is stressed, the one-way valve in the valve 12 begins to work, and the oil circuit that flows back to fuel tank like this is plugged.In this arranged, for example, 8 of pumps were to anticlockwise, and pipeline 5 is inoperative like this.As in unit A, the pressure-relief valve 6 that links to each other with pressure medium pipeline 4 links to each other with the pipeline 42 that stretches to fuel tank 11.

By the tight structure unit of dot and dash line square frame representative can be installed on public or assembly type shell (outer cover) in.By A, B, C represent each tight structure unit, and C can represent other annex arbitrarily, available C represents other similar tight structure unit, such as, fuel valve, control valve or other similar accessories, each independent element of construction all encapsulates in the enclosure, and only link to each other with a supply lines 14, this supply lines extends each

motor

7,13 by control panel 13 places and is positioned at apart from annex a distance.

Oil hydraulic circuit according to annex illustrated in fig. 1 is different with known oil hydraulic circuit.Generally, control annex by four Twoway valvess in the control box and oil hydraulic circuit, like this can corresponding generation restriction loss.According to the oil hydraulic circuit among Fig. 1, handle all not with the annex of throttle valve by utilizing the motor counterrotating.

By utilizing this tight structure, not only the advantage of electric actuation can be used but also the advantage of hydraulic system can be kept, all basic hydraulic control components are all integrated and without any need for independent pipeline in this element of construction.

By utilizing this tight structure, oil drain quantity is very little.The compressibility of pressure medium just can not present yet, and the annex that is in unlatching or closed condition in the chosen in advance position can not change owing to pressure medium expands or compresses, and this can provide higher Security for known system.

Fig. 2 utilizes a schematic representation that electric actuator first embodiment of the annex of type shown in Fig. 1 has been shown.May be with the relatively remote element of construction A that arranges, B, C is by control panel 13 controls, and aboard ship panel 13 can be arranged in apart from element of construction position far away.

Three core cable 14 stretches to the motor 7 of the annex 1 that can be driven by both direction, neutral line N of cable 14 tools and two electric lead L that motor is rotated to the left or to the right _OpenAnd L _Closed, at two lead L _OpenAnd L _ClosedIn all distinguish deploy switch 15a or 15b, when the actuator of annex 1 arrives the terminal position of appointment, 15a or 15b according to the signal that sends by the detectable limit switch (not shown) that goes out the actuator end position make appointment the lead outage so that motor 7 stop, on control panel 13, cable 14 links to each other with circuit 16, and circuit 16 links to each other with 220V ac power line 17.18 represent 24 volts of DC control lines, and this guide line and control and indicator elment are such as linking to each other with tutorial light 20 with a switch 19, and control also links to each other with circuit 16 with indicator elment.

On the control panel 13 unit B have a corresponding circuit 16 ', circuit 16 ' mode of connection is identical with 16, cable 14 ' form by a double wired conductor, this be because since annex 2 on opposite direction, be subjected to spring action so motor 7 ' only need folk prescription to rotation.At lead L _OpenOn also settle a switch 15 '.For connection works in hydraulic pressure in the annex 2, solenoid valve 12 shown in Figure 1 is connected in lead L as follows _OpenAnd between the neutral line N: when switch 15 ' closure, solenoid valve 12 is connected oil hydraulic circuit shown in Figure 1 by one-way valve, can keep existing hydraulic pressure in the annex like this.When voltage failure by making the lead L in the circuit 16 _OpenOutage or get final product release by proper method, solenoid valve 12 makes the liquid in the annex 2 flow release, spring 3 throttle downs then like this.

Control gear shown in Figure 2 is worked as follows.If revolving actuator 1 is to move in unit A, such as moves to operating position by the enable possition, switch 19 closures at control panel 13 places, like this, and by circuit 16, power line 17 and lead L _ClosedConnect.Two switch 15a, 15b is closed at the place, neutral position, makes the electric current inflow motor like this.In such cases, motor 7 rotations, such as, arrive its operating position until revolving actuator 1 to right rotation.When 1 had arrived operating position, 15b was opened by terminal position limit switch (not shown) switch, motor 7 outages.Under identical with it working method, open the flap cover that links to each other with revolving actuator 1, switch 19 switches to open position, and this moment is by utilizing circuit 16, lead L _OpenConnect with power line 17.When arriving the enable possition, switch 15a also opens, and motor is with regard to stall like this.

For substituting the single switch 19 on the control panel, two switches for example also can be set, one is used in the enable possition, and another is used in operating position.It also is feasible utilizing touch switch to make circuit 16 work.

In order on control panel 13, to indicate, in circuit 16, be used for determining by lead L by one to this information of terminal position _OpenOr L _ClosedOr the measuring circuit whether electric current on the relevant lead is cut off by switch 15 can realize monitoring function.Actuator can't arrive under the terminal position situation in annex, and the tutorial light 20 of setting is used to refer to " unlatching ", " closure " and " fault ".This can monitor by a timer in the circuit 16, and the value of timer is adjusted to annex actuator common working time.For example, if the actuator terminal position is not indicated by arbitrary terminal position limit switch, the switch 15 of appointment is not opened, and motor 7 can continuous running.This can be judged to be fault by timer in circuit 16, and is indicated by corresponding lamp, owing to can't realize by the cut-out function of utilizing switch 15, makes motor 7 stalls by circuit 16.

The control gear of unit B moves with the same manner work.For the power that can make valve 2 head on spring 3 is opened, for example, thereby make switch 19 ' closure lead L on the control panel 13 _OpenBe communicated with power line 17 motor is started working.When the incoming terminal position, limit switch 15 ' open, the electric current of sending into motor like this is cut off.This can circuit 16 ' in by the electric current in the lead is monitored confirm and by lamp 20 ' in one indicate.In order to rely on spring force that valve 2 cuts out, as long as by diverter switch 19 ' power line 17 is communicated with the lead disconnection, thereby set up hydraulic pressure at the adjustable piston place of valve 2, so valve cuts out by spring force by solenoid valve 12.

Fig. 3 shows an embodiment, wherein, end position switch 23 is arranged on annex 1, and it is as the end position of determining actuator.This Terminal Type position switch 23 can work to the switch 24 on the lead that shows

cable

25, and 25 link to each other with control panel 13.

Terminal (position) switch 23 can have various different embodiments, for example can be mechanical type end position switch, electronic limit switch and similar products.Can realize the position indication according to the position response that provides by

end position switch

23,24.

In Fig. 3, on the lead of the supply lines 14 that links to each other with motor, pressure switch 43a is arranged, 43b, these pressure switches work by the pressure of pressure medium.When annex 1 incoming terminal position, be that pressure switch makes the motor stall, so the time the remaining in operation to make and set up higher hydraulic pressure in the pipeline of motor, the reaction by pressure switch 43 makes the motor stall.The effect of

limit switch

23,24 only is to be used for the video terminal position.

One amounted to cover plate (or valve and so on) and be pressed in the seal washer in closed position usually by what rotary actuator 1 was handled, required pressure ratio makes it be wanted greatly by the breakout pressure of enable possition when operating position move when opening this flap cover like this.Therefore if opening under the situation of flap cover, the breakout pressure of sending among the pressure switch 43a of unlatching will be higher, thereby the signal of motor outage can be triggered too early.For avoiding above-mentioned situation to take place, a branch road 21 is provided on the pressure switch 43a in element of construction A, a terminal position limit switch 22 that branch road 21 is kept closed is set on branch road, even like this during the of short duration disconnection of pressure switch 43a, still can (by branch road 21) provide electric current to motor, thereby flap cover is rotated, such as rotate 3-5 °, when flap cover turns over 3-5 ° by operating position, switch 22 just disconnects, and owing to flap cover is removed from closed position, thereby the pressure in the revolving actuator is reduced to normal pressure again, thereby pressure switch 43a is closed, provides electric current until 1 incoming terminal position to motor like this.

In the time need carrying out recanalization to the limit switch in the known hydraulic, by pressing structure shown in the present, wherein all hydraulic control unit all is integrated in the tight structure unit, utilize limit switch or pressure switch to make this method of motor stall, can obtain the automatic terminal positioning control.

Fig. 4 utilizes a bus system to show element of construction A by a schematic representation, B, the driving process among the C.Motor is provided with shown in Fig. 3 in order to show that actuator has supported the end position switch in each element of construction of end position at 24 places with signal 7 representatives.In control panel 13, there is a

bus system

26,26 to supply with 24V voltage by circuit 18 and 27.See that further bus system 26 is continuous with each control and

indicator elment

19,20, i.e. 19,20 identical with described in Fig. 2.With each element of construction A, B, control that C is relevant and

indicator elment

19,20 are arranged on the control panel 13.

The bus line 28 that is stretched out by main bus system on the control panel 13 extends to the bus substation 29 that is arranged on the element of construction A, and the bus substation 29 that is arranged in element of construction B by the bus line 30 and the next one successively links to each other.Bus substation 29 also connects in this way in next element of construction.In this embodiment, power by 31 at bus substation 29 places of bus system.The tie 32 of being drawn by each bus substation 29 links to each other with each element of construction.In this embodiment, if one group of element of construction also can be connected to one group of element of construction on the one bus substation 29 simultaneously at a distance of nearer, caused that element of construction still can be driven under the bigger cost situation avoiding drawing more cables like this, as C by 29 places " shown in.

With according to Fig. 2,3 embodiment compares, Fig. 2, circuit must link to each other with each element of construction in 3, and the embodiment who presses Fig. 4, thereby owing to only need that a bus line 28 is caused each element of construction by control panel 13 wiring is simplified.

Fig. 5 shows another embodiment of tool Integration Bus interface, and the system of the same main bus with enforcement shown in Figure 4 26 also is arranged on the control panel, drives and position signal by utilizing 24 volts of control voltages to produce.In the embodiment shown in fig. 5, an EBI 33 is made of one with each element of construction, and in all cases, EBI links to each other with EBI in next element of construction by bus line 30.In this embodiment, also be by giving each element of construction power supply in the electrical network of proximity structure unit by circuit 31.

Fig. 6 shows and electric actuator and the EBI 33 shown in Fig. 5 that the end position switch links to each other.This element of construction is identical with element of construction A shown in Figure 3, and has end position switch 24 and pressure switch 15a, 15b.As shown in the figure, the end position switch links to each other with a serial/parallel interface 34 in element of construction, and interface 34 and a logic control circuit 35 link to each other with bus line 28 from bus system 26.See that further interface 34 links to each other with the actuator circuit, and, come motor 7 is implemented unlatching/shutdown control by the contact 37 that is positioned on the power line 31 thus at this place's diverter circuit element 36.Component 38 provides voltage for interface 34 and logic control circuit 35.By realize the driving of terminal stroke switching response and motor at the cabling of element of construction inside.

By using bus system according to Figure 4 and 5, also extraneous information can be sent to control panel, as in order to replace attaching terminal switch 24, element of construction can be equipped with telemetering pickup or other suitable element with to actuator position, for example the neutral position of actuator produces continuous response.

When the drive controlling that has or do not have quick interrupt function being provided and regulating, application comprises the embodiment by the described control gear of tight oil hydraulic circuit shown in Figure 1, superiority is not only arranged in Marine engineering, at chemical industry and industrial field superiority is arranged also equally.

Fig. 7 shows the annex 1 that is moved by the effect of pressure at both sides medium, identical with the valve 1 of element of construction A among Fig. 1, drive the small gear that is installed on one 50 in the annex 1 by the piston of not expressing among Fig. 7 by a tooth bar, axle 50 (not shown) that can link to each other with a flap cover or similarity piece.46 and 46 ' referring to the joint among Fig. 1, it is used for linking to each other with an emergency power hydraulic package or a hand pump.

Shown in the exemplary embodiments, the flange 51 on tool one plane screws in the bottom surface of annexes 1, the shell 52 of the driver element 48 that schematically illustrates among Fig. 1 links to each other with flange by screw.In elongated envelope 52, dispose motor 7 and by electric motor driven pump 8.At pump 8 near zones, also have oil hydraulic circuit element or valve and little pressure medium tank 11 as shown in Figure 1 in the shell 52.

Hydraulic pipe line

4,5 among Fig. 1 passes lug area 51, and lug area 51 is corresponding to the separation plane 47 between annex among Fig. 11 and the driver element 48.The filling nozzle of 53 expressions, one pressure medium among Fig. 8.

Roughly shell 52 in a tubular form at two ends by one the lid 54 or 54 ' tightly seal.Being cast with a

switch capsule

55,55 on the tube-like envelope 52 is tightly sealed up by a lid equally.On switch capsule 55, threaded cable joint 56 is arranged, 57(Fig. 7), the cable that they can be used to be connected to the motor power supply be connected an independent signal cable.Two cables are all linked on the bar shaped tenminal block 58 in the switch capsule 55.

Fig. 9 illustrates the device 59 on the annex 1, and this device threaded shaft 50 is provided with, and is used for setting up end position for the piston of annex 1.General secaled-off tube 60 installs 59 therewith with switch capsule 55 and couples together, and is extended on the bar shaped tenminal block 58 in the switch capsule 55 by the device 59 electric wire (not shown) that stretch out.Fig. 8 and Fig. 9 show pressure switch 49,49 ' 49 and 49 among Fig. 1 ' be placed in the shell 52 lateral widening portions.Pressure-relief valve 6 also is configured in this zone of shell 52.

Fig. 9 shows the one handle 61 of switch 43 among Fig. 1, if will utilize instrument with hand rotatingshaft 50, relies on this device can make

pressure medium pipeline

4,5 open-minded so, and makes 4,5 to be communicated with fuel tank 11.

Claims

1, is used for operating hydraulically operated fittings, particularly the device of the hydraulic services on the Marine engineering.Be each single annex (1,2) driving of configuration is used for producing the motor (7) of the pump (8) of hydraulic pressure, annex (1), motor (7) and pump (8) and oil hydraulic circuit constitute a tight structure unit (A together, B, and have only motor (7) to start C), from control point, center (13).

2, press the device of claim 1, it is characterized in that: motor (7), pump (8), oil hydraulic circuit element and fuel tank (11) all are contained in the housing (52), this housing be seal on the hydraulic pressure and can with annex (1,2) connect mutually, a bar shaped tenminal block (58) that is used to connect electric wire is arranged in the housing so that implement automatically controlled.

3, by the device of claim 1, it is characterized in that: pump (8) by at least one adjustable relief valve (10) with link to each other with fuel tank (11) that element of construction integrally combines.

4, by the device of claim 1 and 2, it is characterized in that: adjustable restrictive valve (41) is configured in pump (8) feed flow direction and is positioned between the pipeline (4,5).Adjustable restrictive valve can make back liquid flow from the feed flow effluent to the suction side.

5, by the device of claim 1 to 3, it is characterized in that: the safeguarding mechanism that comprises a safety overflow valve (6) at least is installed in annex (1,2) and has between the pump (8) of control unit (9,10,41).Safeguarding mechanism is used to protect annex and links to each other with fuel tank (11).

6, press the device of claim 1 to 4, it is characterized in that: from central control point (13) to each element of construction (A, B, C) electric wiring (14) is used for drive motor (7), switch (15) is configured in the power supply line (14), when the annex motion reaches end position, the electric current of switch (15) sever supply motor (7), be provided with the current monitoring device at central control point (13), this current monitoring device is to the shutoff of switch (15) action that reacts, to confirm that annex is to end position.

7, press the device of claim 1 to 4, it is characterized in that: in central control point (13) is gone up the circuit (16) that disposes a time unit piece is arranged, this timing element is monitored the setting up time of annex according to disconnecting the signal that sends to motor (7) powered switch (15).

8, press the device of claim 1 to 4, it is characterized in that: be provided with a bus system (26) at central control point (13), this bus system is connected with each substation (24) by bus (28), each substation is arranged at element of construction (A, B C) goes up and each substation connects by bus (30) to each other.

9, by the device of claim 8, it is characterized in that: EBI (33) collection is contained in each element of construction.

10, by the device of claim 8, it is characterized in that: (A, B C) locate to power by bus system substation (29) or at EBI (33) in each single structure unit.